




DC Audio 90.4 4-Channel Amplifier 90W x 4 RMS
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 in the contiguous US. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
Subwoofer Wiring Diagram
Select your configuration to view possible wiring combinations.
Loading wiring diagrams…
Diagrams are on our wiring diagram page.
- 90W x4 @ 4 Ω · 130W x4 @ 2 Ω RMS — Competition 4-channel
- 250W x2 bridged at 4 Ω
- Variable high-pass + band-pass filters
- Fully active crossover
This Listing Includes: (1) DC Audio 90.4 4-Channel Amplifier
The DC Audio 90.4 is a competition-series 4-channel amplifier with a fully active crossover and clean power for SQ-minded builds — 90 watts x4 at 4 ohms (500 watts total). Amplify your front stage and bridge the rear two channels to your sub stage with bass-knob control. A heavy-duty heatsink and high-quality parts make it one of the most versatile 4-channels on the market. Authorized DC Audio dealer at JS Ultimate Sounds. Free shipping on orders $99+.
Features
- Fully active crossover
- Variable high-pass + band-pass filters
- Bass knob control
- 8 AWG speaker connections, 4 AWG power/ground
- HD heatsink, high-quality parts
Specifications
| RMS Output | 90W x4 @ 4 Ω; 130W x4 @ 2 Ω; 250W x2 @ 4 Ω bridged; 500W @ Total |
| Channels | 4-Channel |
| Class | Class D |


